INVESTIGADORES
SANGORRIN marcela paula
artículos
Título:
Diversity and killer behaviour of indigenous yeasts isolated from the fermentation vats surfaces in four Patagonian wineries.
Autor/es:
MARCELA PAULA SANGORRÍN; CHRISTIAN ARIEL LOPES; MARIA ROSA GIRAUDO; ADRIANA CATALINA CABALLERO
Revista:
INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY
Editorial:
Elseiver
Referencias:
Año: 2007 vol. 119 p. 351 - 357
ISSN:
0168-1605
Resumen:
The diversity and killer behaviour of the yeast biota associated with surfaces of four Patagonian wineries were analyzed in the present study. These wineries were different in their technological and ecological features. Yeast isolates were identified by pheno and genotyping and characterized using killer sensitivity patterns. Out of 92 isolated yeasts, 25 % were Saccharomyces cerevisiae;18 % were iKloeckera apiculataand 11 % were Pichia anomala; other six species representing a low percentage were also found. A particular biota composed mainly byS. cerevisiae(57%) andP. anomala(37%) was found in the winery located far from the other three wineries. As a whole, the wineries using spontaneous fermentation showed a major percentage ofS. cerevisiaei and a minor percentage of iK. apiculataThe present study shows a great heterogeneity in killer behaviour: killer, 35%, neutral, 25% and sensitive, 40%. In particular, i S. cerevisiae i isolateshave a higher sensitivity to killer reference yeasts than non-iSaccharomyces i isolates. On the other hand, most of the no Saccharomycesyeasts isolated from fermentation vats are resistant toSaccharomycestoxins.